Osteogenin
成骨素
🗣️ 情景例句
I'm a friend of Pete's.
我是Pete的朋友。
Can I have a word with you?
我能跟你谈一谈吗？
You will find that people will help you if you are ready to help them.
你会发现，如果你乐于帮助别人，别人也会帮助你。